2-11
Chapter 2: Motherboard information
2.
AT/ATX mode selection (3-pin AT_ATX_SEL)
Pins
1-2 (Default)
ATX mode
2-3
AT mode
2
1
2 3
High Active
(Default)
Low Active
AT_ATX_SEL
Connector type
HEADER 1x3p, 2.54mm pitch, S/T
3.
Chassis intrusion header (4-1 pin_CHASSIS)
This header is for a chassis-mounted intrusion detection sensor or switch. Connect
one end of the chassis intrusion sensor or switch cable to this connector. The
chassis intrusion sensor or switch sends a low-level signal to this connector
when a chassis component is installed. The signal is then generated as a chassis
intrusion event.
PIN 1
+5VSB_MB
Chassis Signal GND
CHASSIS
Connector type
HEADER 4p, K2, 2.54mm pitch
